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collinz1_17223's avatar
collinz1_17223
Icon for Nimbostratus rankNimbostratus
Apr 10, 2013

irule: Members down, select pool and URI

I have an irule that we have used now for some time:

 

 

when HTTP_REQUEST {

 

if { [active_members [LB::server pool]] < 1} {

 

snat automap

 

pool pool_sorry

 

}

 

}

 

 

This irule works fine, however what I now want to be able to do is sent HTTP requests to a pool / pool member and specific URI when the active_members is <1.

 

 

To clarify the new irule would look something like this (syntaxes obviously not correct, but just to get what I am trying to achieve across)

 

 

when HTTP_REQUEST {

 

if { [active_members [LB::server pool]] < 1} {

 

snat automap

 

pool pool_sorry /page1.aspx

 

}

 

}

 

 

Any ideas would be greatly appreciated, I know I can do a simple HTTP::redirect but I am trying to avoid this.

 

 

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7 Replies

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  • What_Lies_Bene1's avatar
    What_Lies_Bene1
    Icon for Cirrostratus rankCirrostratus
    Apr 10, 2013
    I would have thought this would do it; 

    
when HTTP_REQUEST {
 if { [active_members [LB::server pool]] < 1} {
  snat automap
  HTTP::uri "/page1.aspx"
  pool pool_sorry
 }
}
  • Kevin_Stewart's avatar
    Kevin_Stewart
    Icon for Employee rankEmployee
    Apr 10, 2013
    You can use the HTTP::uri command to (re)set the URI: 

    
when HTTP_REQUEST {
        if { [active_members [LB::server pool]] < 1} {
                snat automap
                HTTP::uri "/page1.aspx"
                pool pool_sorry
        }
}
  • collinz1_17223's avatar
    collinz1_17223
    Icon for Nimbostratus rankNimbostratus
    Apr 10, 2013
    Thanks for your responses guys, that does indeed achieve what I was after, the only problem I seem to have now is that if the Virtual Server that this rule is associated to is an SSL site the F5 attempts to connect to the “pool_sorry” on port 443, even though the pool member are setup for port 80.

     

    This happens regardless of whether you have an SSL Profile (Server) configured for your normal pool.

     

  • Kevin_Stewart's avatar
    Kevin_Stewart
    Icon for Employee rankEmployee
    Apr 11, 2013
    So just to clarify, do you have a server SSL profile assigned to the virtual server? If so you'll need to disable that profile when sending traffic to the port 80 sorry pool. 

    
when HTTP_REQUEST {
        if { [active_members [LB::server pool]] < 1} {
                snat automap
                SSL::disable serverside
                HTTP::uri "/page1.aspx"
                pool pool_sorry
        }
}